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INDICATOR.

r Patented March 13, 1877.

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INDICATOR.

vPaelnt-e'd March 13, 1877.

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MPEIERS. PHOTO-MTHOGRAPHER WASH NGTON D C STATES SE'IH WHEELER, OF ALBANY, NE'W YORK.

IMPROVEMENT IN INDICATORS.

Specification forming part of Letters Patent No. l8,l15l, dated March 13, 1877; application filed `July 21, 1876.

To all whom fit may concern.'

Be it known that I, SETE WHEELER, of Albany, in the county ot" Albany and State ot' New York, have invented a new and useful Improvement inIndicators; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making part of this specification, in which- Fignre 1 is a front view of myimproved indicator. Fig. 2 is a transverse section ot' the same. Fig. 3 is a detailed perspective view of the linger-motion, and Fig. 4 is a vertical section of one of the diaphragms by which the tingerinotion is operated.

The nature ot' myinvention consists in certain constructions, combinations, and arrangements ot' partsfhereinafter described and specifically claimed, whereby a very reliable and quick-acting indicator for low or high water in boilers, reservoirs, cisterns, ships holds, and similar vessels is produced.

The object of my invention is to make a very sensitive indicator of the above description, which operates with reliability even at a great distance from its source of operation.

To enable others skilled in the art to under stand my invention, I will proceed to describe it.

In the accompanying drawings, A represen ts a cylindrical case, the bottom of which is provided with two depressions, B. The said depressions B are closed by dat elastic fabrics or skins C, which are air-tight, attached firmly or held securely to the bottom of the vessel 1 A by two rings, D, and set-screws d. At the center ot' the elastic cover U a stand, E, is fastened by meansot' a collar, e, and a washer, el, which are clamped together by a screw, E. The collar eor the washer el is provided at the face with an annular ridge, e2, whereby leakage between the collar and washer is prevented. The two stands E are coupled by a lever, F, fulcrumedv at f, and provided with a rectangular arm, f. The arm f is connected with a lever, G, by means of a link, g. The fulcrum of the lever G consists of a shat't, g', which is placed in a frame composed ot' two parallel bars, H H', and several connecting' cross-bars, h. The bar H' is fastened to a bracket, h', attached to the bottom ot' the case A. The lever G is connected at its lower end by means ot'a link, i, with a lever-arm, I, on a shaft, J, towhich the pointer or finger K is attached. The shaft J is held between the bars H H. The bar H has an arm, L, with two banking-pins, l, between which the lever F is plying, and whereby its oscillations are limited, so as not to move the pointer K beyond the Yextreme marks ot' the dial. The dial M is' fastened to small projections m on the case A, and is situated between the balanced pointer K and its operating parts. Said dial is provided with a graduated scale, representing the different heights, of Water. The case A is covered with a glass, N, held in place by a rim, O, fitted upon thecase. The depressions B communicate, by means of pipes or airtight hose P, with two coupled diaphragnis, Q, Which'are operated by coupling-rods Q and a crank, B, or by other similar meansconnected with a float. The construction and operation ot' the said diaphragrns Q being precisely the same as those for which a patent was allowed to me on the 9th day of May, 1876, I do not therefore deem a description ot' their details necessary. The depressions B are furnished at their backs with projections b, which are bored and tapped for the insertion ot' a pipe either from above or below, and thereby afford a convenientfmeans for connection with the coupled diaphragms Q. In case the indicator is to be close against a wall,the central plugs b are removed and the connecting-pipes P inserted in their place, the said pipes P being conducted through. the ,-Wall.

In many instances but a single line of pipe and one set of diaphragms need be used-for instance, if the distance between the float and indicator is short or the pipe is run where it will not be subject to much change of temperature.

Operation: When the float, which moves the coupling-rod Q', is moved up or down by' the changeset' the water-level upon which it is borne, it moves the diaphragms Q to the right or left. In the first case the air-column between the right diaphragm and the right depression B is propelled toward lthe case A, thereby pushing the cover G and the right stand E out, and throwing the. lever F out ot' its normal position. The air-column between `high water the described operation is reversed.

Having thus described my invention, what I claim, and desire tosecure by Letters VPat- 1. A water-indicator having a diaphragm or piston which is connected to a pointer, and is operated by the Iaction of a movin g column of air, 'substantially as described.

2. A water-indicator having two elastic diaphragms or pistons which are connectedrvwith a pointer,vand operated by the simultaneous action of two separated and oppositely-movingr air-columns, `substantially as described.

3. In an indicator operated b v movable aircolumns, the diaphragms C, the lever F, the lever G, the lever-arm I, and the pointer K, constructed and operating substantially as set forth.

4. Au indicator having two sets of coupled diaphragms, one set imparting motion to the other through compression and expansion of tbe air confined between them, substantially as and for the purpose set forth. i

Witness my hand in the matter of my application for a patent for an indicator this 19th day of July, 1876.

SETH WHEELER. Witnesses: t

GEORGE C. LEE, E. WACKERHAGEN. 

